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  Theory of Laser-Controlled Competing Superconducting and Charge Orders

Sentef, M. A., Tokuno, A., Georges, A., & Kollath, C. (2017). Theory of Laser-Controlled Competing Superconducting and Charge Orders. Physical Review Letters, 118(8): 087002. doi:10.1103/PhysRevLett.118.087002.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-0144-E Version Permalink: http://hdl.handle.net/21.11116/0000-0002-A4A6-9
Genre: Journal Article

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1611.04307.pdf (Preprint), 751KB
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 Creators:
Sentef, M. A.1, 2, Author              
Tokuno, Akiyuki3, 4, Author
Georges, Antoine3, 4, 5, Author
Kollath, Corinna6, Author
Affiliations:
1Center for Free-Electron Laser Science, 22761 Hamburg, Germany, ou_persistent22              
2Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3012828              
3Centre de Physique Théorique, École Polytechnique, CNRS, 91128 Palaiseau Cedex, France, ou_persistent22              
4Collège de France, 11 place Marcelin Berthelot, 75005 Paris, France, ou_persistent22              
5Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland, ou_persistent22              
6HISKP, University of Bonn, Nussallee 14-16, D-53115 Bonn, Germany, ou_persistent22              

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 Abstract: We investigate the nonequilibrium dynamics of competing coexisting superconducting (SC) and charge-density wave (CDW) orders in an attractive Hubbard model. A time-periodic laser field →A(t) lifts the SC-CDW degeneracy, since the CDW couples linearly to the field (→A), whereas SC couples in second order (→A2) due to gauge invariance. This leads to a striking resonance: When the photon energy is red detuned compared to the equilibrium single-particle energy gap, CDW is enhanced and SC is suppressed, while this behavior is reversed for blue detuning. Both orders oscillate with an emergent slow frequency, which is controlled by the small amplitude of a third induced order, namely η pairing, given by the commutator of the two primary orders. The induced η pairing is shown to control the enhancement and suppression of the dominant orders. Finally, we demonstrate that light-induced superconductivity is possible starting from a predominantly CDW initial state.

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Language(s): eng - English
 Dates: 2016-11-142017-02-212017-02-21
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevLett.118.087002
arXiv: 1611.04307
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Project name : We acknowledge stimulating discussions with A. Cavalleri, A. Kampf, and G. Mazza. This work was financially supported by the DFG through the Collaborative Research Center 1238 project C05 (C. K.) and through the Emmy Noether program (M. A. S.). We further acknowledge financial support by the European Research Council through ERC-319286 QMAC (A. G.) and ERC-648166 Phonton (C. K.).
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 118 (8) Sequence Number: 087002 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: /journals/resource/954925433406_1